Red Hat Enterprise Linux (c-ares): Schwachstelle ermöglicht Denial of Service
WID-SEC-2023-1450 · first 14.06.2023 · updated 01.09.2026 · CVSS 7,5
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux in c-ares ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Oracle Linux 9
- Open Source CentOS
- Amazon Linux 2
- Red Hat Enterprise Linux
- Ubuntu Linux
- Oracle Linux
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux Advanced Cluster Security for Kubernetes 4
- Dell Avamar
- Dell NetWorker Virtual Edition
- Dell Secure Connect Gateway <5.36.00.16
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Dell Secure Connect Gateway 5.36.00.16
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- RedHat Security Advisory vom 2023-06-13 access.redhat.com
- Oracle Linux Errata repository linux.oracle.com
- Red Hat Security Advisory RHSA-2023:3583 vom 2023-06-14 access.redhat.com
- Oracle Linux Security Advisory ELSA-2023-3584 vom 2023-06-15 linux.oracle.com
- Ubuntu Security Notice USN-6164-1 vom 2023-06-14 ubuntu.com
- Oracle Linux Security Advisory ELSA-2023-3586 vom 2023-06-15 linux.oracle.com
- Red Hat Security Advisory RHSA-2023:3584 vom 2023-06-14 access.redhat.com
- Red Hat Security Advisory RHSA-2023:3577 vom 2023-06-15 access.redhat.com
- Red Hat Security Advisory RHSA-2023:3586 vom 2023-06-15 access.redhat.com
- Red Hat Security Advisory RHSA-2023:3665 vom 2023-06-19 access.redhat.com
- Red Hat Security Advisory RHSA-2023:3662 vom 2023-06-19 access.redhat.com
- Red Hat Security Advisory RHSA-2023:3660 vom 2023-06-19 access.redhat.com
- Red Hat Security Advisory RHSA-2023:3677 vom 2023-06-20 access.redhat.com
- Oracle Linux Security Advisory ELSA-2023-3577 vom 2023-06-22 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2023-3741 vom 2023-06-22 linux.oracle.com
- Red Hat Security Advisory RHSA-2023:3741 vom 2023-06-21 access.redhat.com
- Red Hat Security Advisory RHSA-2023:3943 vom 2023-06-29 access.redhat.com
- Amazon Linux Security Advisory ALAS-2023-1770 vom 2023-07-04 alas.aws.amazon.com
- Red Hat Security Advisory RHSA-2023:4034 vom 2023-07-12 access.redhat.com
- Red Hat Security Advisory RHSA-2023:4035 vom 2023-07-12 access.redhat.com
- Red Hat Security Advisory RHSA-2023:4036 vom 2023-07-12 access.redhat.com
- Red Hat Security Advisory RHSA-2023:4039 vom 2023-07-12 access.redhat.com
- Red Hat Security Advisory RHSA-2023:4033 vom 2023-07-12 access.redhat.com
- CentOS Security Advisory CESA-2023:3741 vom 2023-07-28 lists.centos.org
- Ubuntu Security Notice USN-6164-2 vom 2023-09-11 ubuntu.com
and 3 more sources in the original advisory
CVE: CVE-2023-32067
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.